<template>
  <el-upload
    class="avatar-uploader"
    :show-file-list="false"
    :on-success="handleAvatarSuccess"
    :before-upload="beforeAvatarUpload"
    :http-request="handleupload"
  >
    <img v-if="imageUrl" :src="imageUrl" class="avatar" />
    <el-icon v-else class="avatar-uploader-icon"><Plus /></el-icon>
  </el-upload>
</template>

<script lang="ts" setup>
import { ref } from "vue";
import { ElMessage, UploadRequestOptions } from "element-plus";
import { Plus } from "@element-plus/icons-vue";
import type { UploadProps } from "element-plus";
import Cloud from "leancloud-storage";
// 接收数据
const props = defineProps({
  modelValue: String,
});
// 接收方法
const emit = defineEmits(["update:modelValue"]);
const imageUrl = ref(props.modelValue);
const handleAvatarSuccess: UploadProps["onSuccess"] = (_, uploadFile) => {
  imageUrl.value = URL.createObjectURL(uploadFile.raw!);
};

const beforeAvatarUpload: UploadProps["beforeUpload"] = (rawFile) => {
  if (rawFile.type !== "image/jpeg" && rawFile.type !== "image/png") {
    ElMessage.error("Avatar picture must be JPG format!");
    return false;
  } else if (rawFile.size / 1024 / 1024 > 2) {
    ElMessage.error("Avatar picture size can not exceed 2MB!");
    return false;
  }
  return true;
};

const getBase64 = function (
  img: any,
  callback: (arg: string | ArrayBuffer | null) => void
) {
  const reader = new FileReader();
  reader.addEventListener("load", () => callback(reader.result));
  reader.readAsDataURL(img);
};

const handleupload = (options: UploadRequestOptions) => {
  getBase64(options.file, (base64: any) => {
    const file = new Cloud.File("vue-driving-admin.png", { base64 });
    file.save().then((res: any) => {
      imageUrl.value = res.attributes.url;
      emit("update:modelValue", res.attributes.url);
    });
  });
};
</script>

<style scoped>
.avatar-uploader .avatar {
  width: 150px;
  height: 150px;
  display: block;
}
</style>

<style>
.avatar-uploader .el-upload {
  border: 1px dashed var(--el-border-color);
  border-radius: 6px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: var(--el-transition-duration-fast);
}

.avatar-uploader .el-upload:hover {
  border-color: var(--el-color-primary);
}

.el-icon.avatar-uploader-icon {
  font-size: 28px;
  color: #8c939d;
  width: 150px;
  height: 150px;
  text-align: center;
}
</style>
